Śrīmad Bhāgavatam 2.3.22

barhāyite te nayane narāṇāḿ 

lińgāni viṣṇor na nirīkṣato ye 

pādau nṛṇāḿ tau druma-janma-bhājau 

kṣetrāṇi nānuvrajato harer yau (Śrīmad Bhāgavatam 2.3.22) 

The eyes which do not look at the symbolic representations of the Personality of Godhead Viṣṇu [His forms, name, quality, etc.] are like those printed on the plumes of the peacock, and the legs which do not move to the holy places [where the Lord is remembered] are considered to be like tree trunks.

( Especially for the householder devotees, the path of Deity worship is strongly recommended. As far as possible, every householder, by the direction of the spiritual master, must install the Deity of Viṣṇu, forms like Rādhā-Kṛṣṇa, Lakṣmī-Nārāyaṇa or Sītā-Rāma especially, or any other form of the Lord, like Nṛsiḿha, Varāha, Gaura-Nitāi, Matsya, Kūrma, śālagrāma-śilā and many other forms of Viṣṇu, like Trivikrama, Keśava, Acyuta, Vāsudeva, Nārāyaṇa and Dāmodara, as recommended in the Vaiṣṇava-tantras or Purāṇas, and one's family should worship strictly following the directions and regulations of arcana-vidhi. Any member of the family who is above twelve years of age should be initiated by a bona fide spiritual master, and all the members of the household should be engaged in the daily service of the Lord, beginning from morning (4 a.m.) till night (10 p.m.) by performing mańgala-ārātrika, nirañjana, arcana, pūjā, kīrtana, śṛńgāra, bhoga-vaikāli, sandhyā-ārātrika, pāṭha, bhoga (at night), śayana-ārātrika, etc. Engagement in such worship of the Deity, under the direction of a bona fide spiritual master, will greatly help the householders to purify their very existence and make rapid progress in spiritual knowledge. Simple theoretical book knowledge is not sufficient for a neophyte devotee. Book knowledge is theoretical, whereas the arcana process is practical.